what are the diseases you can get through needles?

Curious Asked: what are the diseases you can get through needles?

My hubby was injecting a patient who had diabetes. He placed the needle on the table. While disposing it by mistake he pricked himself with the needle after it was lying on the table for 15 minutes. Would he get diabetes? What are the other possible diseases he could get? How long should we wait before we check with the doctor? Can